EP 0180133 B1 19890607 - PROCESS FOR THE PREPARATION OF 9,9-BIS(4-HYDROXYPHENYL) FLUORENE
Title (en)
PROCESS FOR THE PREPARATION OF 9,9-BIS(4-HYDROXYPHENYL) FLUORENE
Publication
Application
Priority
DE 3439484 A 19841027
Abstract (en)
[origin: US4675458A] A method for making 9,9-bis-(4-hydroxyphenyl)-fluorene by reacting fluorenone with phenol at a temperature from 20 DEG to 100 DEG C. in the presence of sulfuric acid of a concentration higher than 70 percent and of a mercaptan, and particularly beta-mercaptopropionic acid, as acidic condensing agents.
IPC 1-7
IPC 8 full level
B01J 27/00 (2006.01); C07B 61/00 (2006.01); C07C 27/00 (2006.01); C07C 37/20 (2006.01); C07C 39/17 (2006.01); C07C 67/00 (2006.01)
CPC (source: EP US)
C07C 37/20 (2013.01 - EP US); C07C 2603/18 (2017.04 - EP US)
Citation (examination)
Archiv der Pharmazie, 288 (1955), S. 234-246
Designated contracting state (EPC)
AT DE FR GB IT NL
DOCDB simple family (publication)
EP 0180133 A2 19860507; EP 0180133 A3 19871104; EP 0180133 B1 19890607; AT E43829 T1 19890615; DE 3439484 A1 19860507; DE 3570864 D1 19890713; JP S61103846 A 19860522; US 4675458 A 19870623
DOCDB simple family (application)
EP 85113418 A 19851022; AT 85113418 T 19851022; DE 3439484 A 19841027; DE 3570864 T 19851022; JP 23776385 A 19851025; US 78346385 A 19851003